|
''Heterandria'' is a genus of livebearing fishes within the family Poeciliidae. Most species occur in Guatemala and its surroundings, particularly Mexico, but the midget livebearer (''H. formosa'') comes from the southeastern United States. Though many Poecilidae are familiar aquarium fishes, e.g. guppies, mollies, platys and swordtails, species within ''Heterandria'' are not commonly kept as fish. Somewhat more frequently found in aquaria is ''H. formosa'', perhaps because it is one of the smallest known fish species in the world; its diminutive males are probably the smallest fish easy to keep as a pet. Species in this genus resemble egg-laying Cyprinodontoidei such as Fundulidae (topminnows) at first glance, and are thus sometimes called "killifish" though this is technically erroneous.〔FishBase (2009): (''Heterandria'' species ). Retrieved April 8, 2009.〕 ==Species== FishBase currently recognize 10 species in this genus, but based on genetics, external characters, morphometrics and meristics ''H. formosa'' (the type species of the genus) is not closely related to the remaining, which should be moved to their own genus, ''Pseudoxiphophorus''.〔Morales-Cazan, A.; and Albert, J.S. (2012). ''(Monophyly of Heterandriini (Teleostei: Poeciliidae) revisited: a critical review of the data. )'' Neotrop. ichthyol. 10 (1).〕〔Agorreta, A.; Domínguez-Domínguez, O.; Reina, R.G.; Miranda, R.; Bermingham, E.; and Doadrio, I. (2013). ''Phylogenetic relationships and biogeography of Pseudoxiphophorus (Teleostei: Poeciliidae) based on mitochondrial and nuclear genes.'' Mol Phylogenet Evol. 2013 Jan;66(1):80-90〕 There are probably more remaining undiscovered as these fishes are rather inconspicuous. However, it is not very likely that many species remain unknown to science as this is genus is only found in a rather restricted region, and only one new species has been discovered since 1980. * ''Heterandria anzuetoi'' D. E. Rosen & R. M. Bailey, 1979 * ''Heterandria attenuata'' D. E. Rosen & R. M. Bailey, 1979 * ''Heterandria bimaculata'' (Heckel, 1848) (Twospot livebearer) * ''Heterandria cataractae'' D. E. Rosen, 1979 * ''Heterandria dirempta'' D. E. Rosen, 1979 * ''Heterandria formosa'' Girard, 1859 (Dwarf livebearer, least killifish) * ''Heterandria jonesii'' (Günther, 1874) (Barred livebearer, barred killifish) * ''Heterandria litoperas'' D. E. Rosen & R. M. Bailey, 1979 * ''Heterandria obliqua'' D. E. Rosen, 1979 * ''Heterandria tuxtlaensis'' McEachran & T. J. DeWitt, 2008 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Heterandria」の詳細全文を読む スポンサード リンク
|